undef

s1a-iw-grd-vh-20181024t010618-20181024t010643-024271-02a7fa-002_filter

s1a-iw-grd-vv-20181024t010618-20181024t010643-024271-02a7fa-001_filter

s1a-iw-grd-vv-20181024t010618-20181024t010643-024271-02a7fa-001_winddir

s1a-iw-grd-vh-20181024t010618-20181024t010643-024271-02a7fa-002_winddir